Liquid Crystal Reflect Array With Auxiliary Electrode Phase Control
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Solution Overview
Problem
Conventional reflect arrays face challenges in optimizing the reflective properties and directional control of radio waves due to limitations in the spacing and arrangement of control electrodes, which affect the area and efficiency of the reflective surface.
Innovation Solution
The proposed reflect array incorporates a liquid crystal layer between patch and control electrodes, with an auxiliary electrode overlapping the control electrodes to enhance high-frequency conduction and maintain a continuous reflective surface, allowing for individual control of the alignment state of liquid crystal molecules and phase adjustment of reflected radio waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If control electrodes are spaced apart to maintain sufficient reflective area, then reflective surface area is improved, but directional control precision deteriorates
Solution Approach 1:
The control electrode is divided into multiple segments (first control electrode and second control electrode) that can be independently controlled. This segmentation allows for more precise directional control of reflected radio waves while maintaining adequate spacing between electrode groups to preserve reflective surface area.
Solution Approach 2:
Different segments of the control electrode are assigned different control signals to create localized phase adjustments in specific regions. This enables precise directional control in different areas of the reflective surface simultaneously, resolving the contradiction between overall area and local precision.
2Measurement precision
If control electrodes are closely spaced to improve directional control, then directional control precision is improved, but reflective surface area deteriorates
Solution Approach 1:
The auxiliary electrode is positioned in a different spatial dimension (overlapping the separated region of control electrodes from the opposite side of the liquid crystal layer), effectively adding a third dimension to the electrode arrangement. This allows closely spaced control electrodes to maintain directional precision while the auxiliary electrode compensates for the reduced reflective area by providing additional reflection path.
3Stability of the object's composition
If auxiliary electrode is added to maintain continuous reflective surface, then reflective surface continuity is improved, but device complexity deteriorates
Solution Approach 1:
The auxiliary electrode serves multiple functions: it maintains the continuity of the reflective surface, provides additional reflection paths, and works in conjunction with the control electrode segments. This multi-functionality justifies the added component by delivering multiple benefits from a single structural addition.
4Adaptability or versatility
If liquid crystal layer is used to enable voltage-controlled dielectric constant variation, then directional control capability is improved, but device complexity deteriorates
Solution Approach 1:
The liquid crystal layer enables dynamic control of the dielectric constant through applied voltage, allowing the reflect array to adapt its directional characteristics in real-time. This parameter change capability provides versatile directional control, and the patent optimizes the overall structure to manage the complexity introduced by this adaptive mechanism.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration improves the reflective characteristics and directional control of radio waves by enabling precise phase manipulation and maintaining a sufficient reflective area, even with closely spaced control electrodes, thereby enhancing the overall performance of the reflect array.
Implementation Method 1
the dielectric constant of the liquid crystals varies with voltage
Implementation Method 2
A reflect array has a function of reflecting incident waves in a desired direction
Data Source
AI summary
A reflect array includes a plurality of patch electrodes arranged spaced apart and interconnected to an incident surface of a radio wave, a plurality of control electrodes arranged spaced apart to correspond to the plurality of patch electrodes and disposed on a rear side of the plurality of patch electrodes, a liquid crystal layer between the plurality of patch electrodes and the plurality of control electrodes, and an auxiliary electrode disposed to overlap a separated region of the plurality of control electrodes.